When to prune Verbina Rigida

Hi All, hope you had a good Christmas & New Year
I have a couple of Verbena Rigida in the garden & was wondering if i should prune them. I only bought them in the Autmn so they are only about a foot high but looking a little straggly at the moment? :confused:

 

Thanks for that, r200! Hope you ahd a good one too.

This is what Crocus says about the plant,
http://www.crocus.co.uk/search/pl/?ContentType=Plant_Card&ClassID=3698&CategoryID

which might be helpful, particularly re winter protection - but doesn't mention anything specific about pruning. It does say it's low-growing, so if yours is a bit straggly, yes, I'd trim it a little - but I'd wait until the beginning of spring to avoid frost damage.

What do others think?

 

If you are going to leave them outside, I would leave the top growth on as Dendro said, to give them a bit more protection over the winter. I dug mine up, and they are overwintering in a summerhouse. The roots are somewhat thick and tuberous and rather brittle. They do say you can treat them like Dahlias, just storing the tubers in a frost free place.